After sales service requirements for hard disks

As they do it regularly, the Hardware.fr site has put online after sales service requests for hard drives recorded by a very large retailer.
Here is the result:
- Western Digital: 1.2%
- Hitachi: 1.4%
- Seagate: 1.6%
- Samsung: 2.8%
These figures are to be weighted according to the capacity of the discs. Indeed, the high capacity models have rates of return much higher, for example 3,7% for Hitachi 1 TB or 3,5% for Spinpoint F1 1TB.
This is certainly related to their mechanics containing more platters and more heads which multiplies the default risk statistically, in addition the heat released is also larger.
This is perhaps the reason that the manufacturers of disks seem to want to give up the disks with 5 platters, and the reason that Seagate refuses to offer disks with more than 3 platters and not to offer a disk of 2 TB.
In any event, the same rule continues to prevail, it is necessary to backup its data with a regularity related to the value that one allots to it.